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WorksheetsScience STAAR Challenge
Total questions: 35
Worksheet time: 2hrs 45mins
A partial grassland food web is shown.
Which of the following best describes a relationship in this grassland?
Badgers are top predators because they eat upland sandpipers and beetles
A producer-consumer relationship exists between lupines and ants
A predator-prey relationship exists between beetles and ground squirrels
Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers
Which statement about stars is correct?
Star formation begins in a nebula
White dwarfs become main-sequence stars when they gain mass
Supergiants are stars that can absorb black holes
Main-sequence stars are formed by comets
The beginning of autumn in North America is in September, but the beginning of autumn in South America is in March. The diagram shows the positions of Earth, the moon, and the sun on one day in September and one day in March.
Why does autumn start in different months of the year in North America and South America?
Earth's orbit around the sun is not a perfect circle
North America has a larger landmass than South America
The moon has a greater pull on South America than on North America
Earth's axis has a 23.5 degrees tilt
This drawing shows a human body system.
What is the primary function of this body system?
The protection of vital organs from injury
The chemical breakdown of food into smaller pieces
The transport of nutrients, water, and oxygen to body cells
The production of hormones that regulate growth and metabolism
How many valence electrons are in an atom of each element in Group 15 in the periodic table?
5
6
4
1
To fight a bacterial infection, a patient was given antibiotic to take for 10 days. After the patient finished taking the antibiotics as directed, almost all the bacteria were killed. After another 10 days, the patient was sick again with the same type of infection.
What most likely happened?
A few bacteria survived the antibiotics and stopped reproducing
The patient's high fever inactivated the antibiotic, allowing the surviving bacteria to grow rapidly
The antibiotic slowed the life cycle of the bacteria
Some of the bacteria were resistant to the antibiotic, and they reproduced
The photograph shows mountains in the Andes range in South America.
Which statement describes the geologic process that is most likely responsible for the formation of these mountains?
They are along a transform plate boundary that is no longer active, so erosion is creating deep valleys
They are along a transform plate boundary in which plates are currently moving side by side, causing earthquakes and faults
They are along a plate boundary in which plates are currently converging, causing uplift and steep slopes
They are along a plate boundary in which plates diverged in the distant past, allowing new rock to build up.
Which moon phase is at position 4?
waning gibbous
waxing gibbous
waning crescent
waxing crescent
What season is it in the Northern Hemisphere in this diagram?
Spring
Summer
Fall
Winter
The sum of all forces acting on an object; same direction = add, opposite directions = subtract
net force
mass
acceleration
gravity
Color change, gas production, light production, temperature change, precipitate, odor change, sound production
Evidences of chemical change
Evidence of physical change
Evidences of mental change
Evidences of clothing change
Have similar properties and valence electron configurations
Periods
Groups
Rows
Classifications
This subatomic particle determines the identity of an atom.
Electron
Neutron
Proton
Valence electron
This explains why a hot air balloon rises
convection
conduction
radiation
introspection
